Rajasthan Technical University, Kota · 2015-11-26 · Q1. Discuss static mho relay and reliaze it...

Rajasthan Technical University, Kota

COURSE – FILE

SWITCH GEAR & PROTECTION

Name : Dr. Dinesh Birla Branch : Electrical Engineering Session : 2014-15, Even Semester Semester : B. Tech 8th Semester


Index: Course–File

Subject: Switch Gear & Protection Session: 2014-15, Even Semester

Year : IV

Sem : VIII

Sr. No.

Content/ Item no. Page No.

1 Students Detail

2 Course Schedule Course-File General Format Time-Table Syllabus Course Plan

3 More on Course Schedule Method of Evaluation Guidelines to Study the Subject Program Outcomes Course Outcomes Objectives – Outcome Relationship Matrix

4 Assignment-1 5 Assignment-2

6 Assignment-3 7 Assignment-4

8 Assignment-5

10 Tutorial-1

11 Tutorial-2

12 Tutorial-3

13 Tutorial-4

14 Tutorial-5

15 Lecture Plan

17 Mid–Term Question Paper (I & II)

18 Performance of Students in Mid Terms


Student Details

Subject: Switch Gear & Protection

Session: 2014-15, Even Semester

Year : IV

Sem : VIII

S. No. Roll No. Student Name

1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28.

29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 43. 44. 45. 46. 47. 48. 49. 50. 51. 52. 53. 54. 55. 56. 57. 58. 59. 60. 61. 62. 63. 64.

65. 66. 67. 68. 69. 70. 71. 72.

1. Name of the Faculty : Dr.Dinesh Birla

2. Designation : Professor

3. Department : Electrical Engineering

Course Details

Name of the Programme : B. Tech. Batch : Electrical

Branch : Electrical Semester : VIII

Title of the Subject : Switch Gear & Protection

Subject Code : 8EE3 No. of Students: 72

General: About Course File Format 1. Time Table and Syllabus. 2. Course Schedule including Course Plan. 3. Experiments List and Lab manual also, if required. 4. List of Assignments / Tutorials/ Seminar Topics given to students. 5. Tutorial Sheet (If required, as per the syllabus). 6. Lecture Plan. 7. Model Question Paper of the subject distributed to students included (Question Bank of important

Questions). 8. Mid –Term Question Paper (I & II) and answer-books. 9. Question of previous years available by University. 10. Marks details of the Students in respect of MTE I (Mid Term Exam) and MTE II.


Course Schedule



Year : IV

Sem : VIII


Course File



Year : IV

Sem : VIII




SYLLABUS COPY:- B.Tech VIII-SEMESTER

8EE3 Switch Gear & Protection

Unit-1 (i) Static Relays: Introduction to static relays, merits and demerits. Comparators: amplitude and phase comparators, duality between amplitude and phase comparators. Introduction to (a) amplitude comparators-circulating current type, phase splitting type and sampling type, (b) phase comparators-vector product type and coincidence type.

(ii) Static over Current Relays: Introduction to instantaneous, definite time, inverse time and directional overcurrent relays.

Unit-2 (i) Static Differential Relays: Brief description of static differential relay schemes-single phase and three phase schemes. Introduction to static differential protection of generator and transformer.

(ii) Static Distance Relays: Introduction to static impedance, reactance and mho relays.

Unit-3 (i) Carrier Current Protection: Basic apparatus and scheme of power line carrier system. Principle of operation of directional comparison and phase comparison carrier protection and carrier assisted distance protection.

(ii) Distance Protection: Effect of power swings on the performance of distance protection. Out of step tripping and blocking relays, mho relay with blinders. Introduction to quadrilateral and elliptical relays.

Unit-4 Circuit Breakers I: Electric arc and its characteristics, arc interruption-high resistance interruption and current zero interruption. Arc interruption theories–recovery rate theory and energy balance theory. Restriking voltage and recovery voltage, develop expressions for restriking voltage and RRRV. Resistance switching, current chopping and interruption of capacitive current. Oil circuit breakers-bulk oil and minimum oil circuit breakers. Air circuit breakers.

Unit-5 (i) Circuit Breakers II: Air blast, SF6 and vacuum circuit breakers. Selection of circuit breakers, rating of circuit breakers.

(ii) Digital Protection: Introduction to digital protection. Brief description of block diagram of digital relay. Introduction to digital overcurrent, transformer differential and transmission line distance protection.

COURSE PLAN Unit No.

Name of Unit Topics to be covered as divided in the unit

Lecture No.

1 Static Relay

Introduction to static relays, merits and demerits and introduction to amplitude comparater 1

Introduction to Phase comparators and duality 2 Various type of Amplitude comparator’s 3 Various type of Phase comparator’s and Introduction to Static over Current Relays. 4,5

Introduction to Instantaneous Static over Current relays and Definite time Static over Current Relays. 6

Introduction to Inverse time Static over Current Relays and Introduction to Directional Static over Current Relays. 7

2 Static

Differential Relay

Brief description of static differential relay schemes and Introduction to single phase static differential relay schemes 8

Introduction to three phase static differential relay schemes and Introduction to static differential protection of generator 9

Introduction to static differential protection of transformer and Introduction to static impedance relay 10

Introduction to static impedance relay and Introduction to static reactance relay.

11 12

Introduction to static mho relays. 13

3 Carrier Current

Protection

Basic apparatus and scheme of power line carrier system and Principle of operation of directional comparison carrier protection 14

Principle of operation of phase comparison carrier protection and carrier assisted distance protection. 15

Effect of power swings on the performance of distance protection and Out of step tripping and blocking relays. 16

Mho relay with blinders and Introduction to quadrilateral and elliptical relays. 17

4 Circuit Breakers I

Electric arc and its characteristics and Arc interruption-high resistance interruption and current zero interruption. 18

Arc interruption theories–recovery rate theory and Arc interruption theories–energy balance theory. 19

Restriking voltage and recovery voltage and Expressions for restriking voltage and RRRV. 20

Air circuit breakers. 21 Resistance switching, current chopping and interruption of capacitive current. 22 Oil circuit breakers-bulk oil circuit breakers and Oil circuit breakers- minimum oil circuit breakers. 23

5 Circuit Breakers II

Air blast circuit breakers and SF6 circuit breakers. 24 Vacuum circuit breakers and Selection of circuit breakers, rating of circuit breakers. 25

Introduction to digital protection and Brief description of block diagram of digital relay. 26,27

Introduction to digital overcurrent protection and Introduction to transformer differential protection. 28

Introduction to digital transmission line distance protection. 29,30

3 METHOD OF EVALUATION

3.1 Mid Term Examinations (MTE I & MTE II) 3.2 Assignment / Tutorials

3.3 Viva wherever applicable

3.4 Term End Examination

Foundation Topics: Introduction to per unit quantities Introduction to Symmetrical component and fault analysis methods

Advanced Topics: Admittance model and Admittance matrix Impedance model and Impedance matrix


More on Course Schedule



Year : IV

Sem : VIII




Guidelines to Study the Subject

1. Preparation: - Basic fundamental of knowledge of simple power flow and faults for their study and analysis.

2. Core Competence: - To provide students the knowledge of power system design and analysis and to determine the operational performance of existing systems.

3. Breadth: -To prepare for a better future in the field of designing new electrical systems.

Learning Environment: - To provide student a friendly and professional environment.





Year : IV

Sem : VIII




The General Categories of Program Outcomes are: Sr. No.

General Categories of Program Outcomes

a Ability to acquire knowledge of specific discipline or professional area with an ability to discriminate, evaluate, analyze and synthesize existing and new knowledge, and integration of the same for enhancement of knowledge.

b

Ability to formulate and analyse complex electrical engineering problems.

c

Ability to solve engineering problems and arrive at feasible, optimal solutions after considering public health and safety.

d

Ability to apply appropriate research methodologies, techniques and tools, design,conduct experiments, analyse and interpret data.

e

Ability to apply appropriate techniques, resources, and modern engineering

f

Ability to collaborative-multidisciplinary scientific research,demonstrate a capacity for self-management and teamwork.

g Ability to manage projects efficiently after consideration of economic and financial factors.

h

Ability to make effective presentations and design documentation by adhering to appropriate standards.

i

Ability to engage in life-long learning independently to improve knowledge and competence

j

Ability to contribute to the community for sustainable development of society

k

Ability to learn from mistakes without depending on externalfeedback





Year : IV

Sem : VIII




On completion of this Subject / Course the students shall be able to understand the following:

S. No. Objectives I Provides the knowledge of Static Relays, merits and demerits, amplitude and phase comparators, duality

between amplitude and phase comparators.

II Provides knowledge of instantaneous, definite time, inverse time and directional over current relays, static differential protection of generator and transformer.

III Provides practical knowledge of static impedance, reactance and mho relays, effect of power swings on the performance of distance protection, Out of step tripping and blocking relays, mho relay with blinders.

IV Provides knowledge of Electric arc and its characteristics, arc interruption-high resistance interruption and current zero interruption, Arc interruption theories–recovery rate theory and energy balance theory.

V Provides techniques for Air blast, SF6 and vacuum circuit breakers, Selection of circuit breakers, rating of circuit breakers, transformer differential and transmission line distance protection.





Year : IV

Sem : VIII

Objectives – Outcome Relationship Matrix (Indicate the relationship by x mark). Program Outcomes

Course Objectives

a

b

c

d

e

f

g

h

i

j

k

I X

II X X X X X X

III X X X

IV X X X

V X X X X X X


Assignment Sheet - I

Subject: Switch Gear & Protection Session: 2014-15, Even Semester

Year : IV

Sem : VIII




Assignment- I Q1. Discuss static mho relay and reliaze it with the help of amplitude and phase Comparator. Q2. Discuss phase comparators-vector product type and coincidence type. Q3. Discuss duality in comparator. Q4. Discuss various type of static relays their merits and demerits.


Assignment Sheet - II



Year : IV

Sem : VIII




Assignment-II Q1. What are the situations where DTOC relays are preferred over IDMT relays? Q2. Static impedence relay and reliaze it with the help of amplitude and phase Comparator. Q3. What is the meaning of the term 'directional' Vis a Vis directional relaying? Q4.Explain the overshoot time of a relay and its significance.


Assignment Sheet - III



Year : IV

Sem : VIII




Assignment-III

Q1. Explain the principle of carrier-based phase comparison scheme. Q2. Explain the working principle of distance relays. Q3 Write short note on

a) Mho relay with blinders. b) Effect of power swing on the performance of distance relay. c) Out Of Step tripping and blocking relay.


Assignment Sheet - IV



Year : IV

Sem : VIII




Assignment-IV

Q1. What is breaking capacity? Q2. What are the types of air blast circuit breaker? Q3.What are the advantages of SF6 circuit breaker?


Assignment Sheet - V



Year : IV

Sem : VIII




Assignment-V

Q1 Discuss SF6 and Vaccum Circuit Brakers ? Q2. What paradigm shift can be seen with the development of numerical relays? Q3. Draw the block diagram of the numerical relay.


Tutorial Sheet – I



Year : IV

Sem : VIII




TUTORIAL-1 Q.1 Explain phase splitting type comparator by drawing a neat diagram and describe the working.

Q.2 Give a classification of phase type comparators and explain how OP-AMP works as level detector.


Tutorial Sheet – II



Year : IV

Sem : VIII




Tutorial-II Q.1How amplitude and phase comparator exhibits duality? Q.2 Describe how static distance relay is realized by a two input phase comparator relay.


Tutorial Sheet – III



Year : IV

Sem : VIII



3. Department : Electrical Engineeing

Tutorial-III Q1. Describe basic principle of air based circuit breaker. Q2 Explain carrier assisted distance protection.


Tutorial Sheet – IV



Year : IV

Sem : VIII




Tutorial-IV

Q1 What is mean by arc interruption .Discuss various type of arc interruption. Q2. Describe the voltage range with regard to the application of various C.B.


Tutorial Sheet – V



Year : IV

Sem : VIII




Tutorial-V

Q1. Explain the statement that all numerical relays have the same hardwarebut what distinguishes the relay is the underlying software. Q2. What are the drawbacks of a very high sampling frequency?

Lesson No.1 Title: Introduction to static relays, amplitude comparators

S.NO Topic Time Alloted(min)

1. Introduction to static relays, merits and demerits. 35

2. Introduction to amplitude comparators 20

Lesson No.2 Title: Introduction to Phase comparators, Duality


1 Introduction to Phase comparators 20

2 Duality between amplitude and phase comparators. 35

Lesson No.3 Title: Circulating Current, Phase Splitting, Sampling type amplitude comparator

S.NO Topic Time Alloted(min) 1. Circulating current type amplitude comparators 20 2. Phase splitting type amplitude comparators 20 3. Sampling type amplitude comparators 15

Lesson No.4 Title: Vector product. Coincidence type phase comparator


1. Vector product type phase comparators 40 2. Coincidence type phase comparators 15

Lesson No.5 Title:Coincidence type phase comparator, static over Current Relays

S.NO Topic Time Alloted(min) 1. Coincidence type phase comparators 40 2 Introduction to Static over Current Relays 15

Lesson No.6 Title:Instantaneous, Definite time Static Over Current Relays


1. Introduction to Instantaneous Static over Current Relays. 25 2. Introduction to Definite time Static over Current Relays. 25

Rajasthan Technical University,Kota

LECTURE PLAN Subject: Switch Gear & Protection

Subject Code: 8EE3 Duration of Lesson: 55 min


Year : IV

Sem : VIII

Lesson No.7 Title:Inverse time, Directional Static Over Current Relays

S.NO Topic Time Alloted(min) 1. Introduction to Inverse time Static over Current Relays. 25 2. Introduction to Directional Static over Current Relays. 25

Lesson No.8 Title: Remedial class, Class test

S.NO Topic Time Alloted(min) 1. Remedial Class 15 2. Class Test 40

Lesson No.9 Title:Static Differential Relay

S.NO Topic Time Alloted(min) 1. Brief description of static differential relay schemes 20 2. Introduction to single phase static differential relay schemes 35

Lesson No.10 Title: Static Differential relay, Differential protection of Generator

S.NO Topic Time Alloted(min) 1. Introduction to three phase static differential relay schemes 20 2 Introduction to static differential protection of generator 35

Lesson No.11 Title: Differential protection of Transformer, Static impedance relay

S.NO Topic Time Alloted(min) 1. Introduction to static differential protection of transformer. 30 2. Introduction to static impedance relay 25

Lesson No.12 Title: Static impedance, reactance relay

S.NO Topic Time Alloted(min) 1. Introduction to static impedance relay 15 2. Introduction to static reactance relay 40

Lesson No.13 Title: Static Mho relay

S.NO Topic Time Alloted(min) 1. Introduction to static mho relays. 40 2. Problem 15

Lesson No.14 Title: Remedial Class, Class Test


Lesson No. 15 Title: Power line carrier system, carrier protection


1. Basic apparatus and scheme of power line carrier system. 30 2. Principle of operation of directional comparison carrier protection 25

Lesson No. 16 Title: carrier protection, carrier assisted distance protection

S.NO Topic Time Alloted(min) 1. Principle of operation of phase comparison carrier protection 30 2. carrier assisted distance protection. 25

Lesson No. 17 Title: performance of distance protection, Out of step tripping and blocking relays


1. Effect of power swings on the performance of distance protection. 35 2. Out of step tripping and blocking relays. 20

Lesson No.18 Title: Mho relay with blinders, quadrilateral and elliptical relays


1. Mho relay with blinders 20 2 Introduction to quadrilateral and elliptical relays. 35

Lesson No.19 Title: Remedial Class, Class Test


Lesson No. 20 Title: Electric arc, current zero interruption


1. Electric arc and its characteristics 25 2. Arc interruption-high resistance interruption and current zero interruption. 30

Lesson No. 21 Title: Arc interruption theories

S.NO Topic Time Alloted(min) 1. Arc interruption theories–recovery rate theory and 30 2. Arc interruption theories–energy balance theory. 25

Lesson No. 22 Title: Restriking voltage and recovery voltage


1. Restriking voltage and recovery voltage 10 2. Expressions for restriking voltage and RRRV. 45

Lesson No.23 Title: Resistance switching, current chopping

S.NO Topic Time Alloted(min) 1. Resistance switching, current chopping and interruption of

capacitive current. 55

Lesson No.24 Title: Oil circuit breakers


1. Oil circuit breakers-bulk oil circuit breakers 30 2. Oil circuit breakers- minimum oil circuit breakers 25

Lesson No. 25 Title: Air circuit breakers


1. Air circuit breakers. 45 2. Problems 10

Lesson No. 26 Title: Remedial Class, Class Test


1. Remedial Class 15 2. Class Test 40

Lesson No. 27 Title: Air blast circuit breakers, SF6 circuit breakers.

S.NO Topic Time Alloted(min) 1. Air blast circuit breakers. 25 2. SF6 circuit breakers. 30

Lesson No. 28 Title: Vacuum circuit breakers, rating of circuit breakers

S.NO Topic Time Alloted(min) 1. Vacuum circuit breakers. 30 2. Selection of circuit breakers, rating of circuit breakers. 25

Lesson No. 29 Title: digital protection, digital relay


1. Introduction to digital protection. 25 2. Brief description of block diagram of digital relay. 30

Lesson No. 30 Title: digital overcurrent protection, transformer differential protection


1. Introduction to digital overcurrent protection. 25 2. Introduction to transformer differential protection. 30

Lesson – 31; Title: Introduction to digital transmission line distance protection

S.NO Topic Time Alloted(min) 1. Introduction to digital transmission line distance protection. 35 2. Problem 20

Lesson – 32; Title: Remedial Class, Class Test


Rajasthan Tecnical university,Kota

I Mid Term Question Paper

Subject: Switch Gear & Protection Subject Code:8EE3

Duration 1Hr. Session: 2014-15, Even Semester

Year : IV

Sem : VIII

Midterm Question Paper-I

Date:13/03/2015

Duration: 1Hr Maximum Marks: 10 Instructions to Candidates: Attempt all questions. Q.1 Give a classification of phase type comparators and explain how OP-AMP works as level detector. Q.2 Explain phase splitting type comparator by drawing a neat diagram and describe the working. Q.3 How amplitude and phase comparator exhibits duality?


II Mid Term Question Paper

Subject: Switch Gear & Protection Subject Code:8EE3

Duration 1Hr. Session: 2014-15, Even Semester

Year : IV

Sem : VIII

Midterm Question Paper-II Date:15/04/2015

Duration: 1Hr Maximum Marks: 10

Instructions to Candidates: Attempt all questions. Q.1 Describe how static distance relay is realized by a two input phase comparator relay. Q.2 Describe basic principle of air based circuit breaker. Q.3 Describe the voltage range with regard to the application of various C.B.


Performance of Students in Mid Term Exams

Subject: Switch Gear & Protection Subject Code: 8EE3

Maximum Marks: 20 Session: 2014-15, Even Semester

Year : IV

Sem : VIII

S. No. Roll No. Student Name

Average Marks

obtained in MT I & MT II

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Rajasthan Technical University, Kota · 2015-11-26 · Q1. Discuss static mho relay and reliaze it...

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